Guthrie, W. K. C. (1978). A History of Greek Philosophy. Cambridge University Press.
Cita Chicago Style (17a ed.)Guthrie, W. K. C. A History of Greek Philosophy. Londres, Inglaterra: Cambridge University Press, 1978.
Cita MLA (9a ed.)Guthrie, W. K. C. A History of Greek Philosophy. Cambridge University Press, 1978.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.